The Gateway Trip

Here is a collection of pieces about the many marvelous discoveries made by humankind using Heechee technology. Each piece includes illustrations by Kelly Freas.
Contents:
The Visit (1990)
The Merchants of Venus (1972)
The Gateway Asteroid (1990)
The Starseekers (1990)
The Home Planet (1990)
Other Worlds (1990)
Heechee Treasures (1990)
Looking for Company (1990)
The Age of Gold (1990)
In the Core (1990)